Hierarchical encoding and decoding devices

a technology of encoding and decoding devices, applied in the field of compression encoding and decoding of data, can solve problems such as degradation of encoding efficiency, and achieve the effect of improving encoding efficiency
US20050030205A1Inactive Publication Date: 2005-02-10FUJITSU LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
FUJITSU LTD
Publication Date
2005-02-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

On the transmitter side, an enhancement layer is hierarchized by expanding a coefficient of orthogonal transformation to a plurality of bit planes or designating a coefficient position in a block. Then, only a coefficient in a position designated by coefficient position information is encoded and streaming distribution is performed. On the receiver side, the coefficient block is restored using the coefficient position information.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application is a continuation of international PCT application No. PCT / JP02 / 02576 filed on Mar. 19, 2002.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to the compression encoding and decoding of data, more particularly relates to a device for generating hierarchically encoded data and decoding the hierarchically encoded data in streaming distribution of data in accordance with an ever-changing bandwidth as in an IP (Internet protocol) network.

[0004] 2. Description of the Related Art

[0005] FIGS. 1 and 2 show the respective configurations of a hierarchically encoding device conventionally used in the streaming distribution of moving pictures and its decoding device, respectively. The encoding and decoding devices are installed in the distribution device of moving pictures and its receiving device.

[0006] Firstly, on the encoder side, a base layer encoding unit 102 encodes an origina...

Claims

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